Powertrain, generic (extended)

P2CD6 Turbocharger/Supercharger Boost Sensor D Circuit

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

A fourth boost pressure sensor, D, is only needed where charge pressure is read at four points, for example on twin-turbo engines with two stages per bank or on combinations of supercharger, turbocharger and electric compressor. Which tap gets the letter is up to the manufacturer. P2CD6 is the umbrella fault for this sensor's circuit when the module does not or cannot separate low, high and implausible readings; those have their own codes P2CD7 to P2CD9. No manufacturer documents P2CD6 publicly, and no lost-communication code for a digital sensor D is defined. CARB requires every such input to be checked for circuit faults. By analogy with sensor A, Ford's 2024 petrol engines check the signal continuously and need 5 s to register a fault. Boost control on the affected path is usually cut back.

Likely causes

Corroded or loose connector, chafed wire at sensor D
Boost sensor D internally faulty
5 V reference or sensor ground interrupted
Input stage of the engine control module faulty

Symptoms

  • Warning lamp on
  • Reduced boost and noticeably less power
  • Other sensor codes at the same time if a shared 5 V supply is affected

Repair estimate

DifficultyMediumDIY possible
Parts and labour€40–350
Time0.3–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

boost pressure sensor dwiring harnessecm

Related codes

P2CD7P2CD8P2CD9P25F2P0235P0239

References: law.cornell.edu, fordservicecontent.com, en.wikipedia.org.